I just remembered there are East Asian flutes that use vibrating membranes to modify the sound: https://en.wikipedia.org/wiki/Dizi_(instrument) https://en.wiki

I just remembered there are East Asian flutes that use vibrating membranes to modify the sound: https://en.wikipedia.org/wiki/Dizi_(instrument) https://en.wikipedia.org/wiki/Dizi_(instrument) https://en.wikipedia.org/wiki/Daegeum https://en.wikipedia.org/wiki/Daegeum These are uncontroversially flutes, so the definition would have to be "mouth-blown wind instruments that generate a tone without using vibrating parts".